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66906122 = 23110310477
BaseRepresentation
bin1111111100111…
…0100000001010
311122220011221112
43333032200022
5114111443442
610350010322
71441456403
oct377164012
9148804845
1066906122
1134848618
121a4a69a2
1310b2752a
148c589aa
155d19082
hex3fce80a

66906122 has 16 divisors (see below), whose sum is σ = 104612352. Its totient is φ = 32056560.

The previous prime is 66906113. The next prime is 66906131. The reversal of 66906122 is 22160966.

It is an interprime number because it is at equal distance from previous prime (66906113) and next prime (66906131).

It is a super-2 number, since 2×669061222 = 8952858322157768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1148 + ... + 11624.

It is an arithmetic number, because the mean of its divisors is an integer number (6538272).

Almost surely, 266906122 is an apocalyptic number.

66906122 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

66906122 is a deficient number, since it is larger than the sum of its proper divisors (37706230).

66906122 is a wasteful number, since it uses less digits than its factorization.

66906122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10613.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 66906122 is about 8179.6162501672. The cubic root of 66906122 is about 405.9650248532.

The spelling of 66906122 in words is "sixty-six million, nine hundred six thousand, one hundred twenty-two".

Divisors: 1 2 31 62 103 206 3193 6386 10477 20954 324787 649574 1079131 2158262 33453061 66906122