66772471 has 8 divisors (see below), whose sum is σ = 69238080. Its totient is φ = 64317792.

The previous prime is 66772469. The next prime is 66772487. The reversal of 66772471 is 17427766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66772471 - 2¹ = 66772469 is a prime.

It is a super-3 number, since 3×66772471³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66772451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10941 + ... + 15913.

It is an arithmetic number, because the mean of its divisors is an integer number (8654760).

Almost surely, 2^66772471 is an apocalyptic number.

66772471 is a deficient number, since it is larger than the sum of its proper divisors (2465609).

66772471 is a wasteful number, since it uses less digits than its factorization.

66772471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5465.

The product of its digits is 98784, while the sum is 40.

The square root of 66772471 is about 8171.4424063319. The cubic root of 66772471 is about 405.6945274347.

The spelling of 66772471 in words is "sixty-six million, seven hundred seventy-two thousand, four hundred seventy-one".