66361140 has 48 divisors (see below), whose sum is σ = 206458560. Its totient is φ = 17696160.

The previous prime is 66361123. The next prime is 66361153. The reversal of 66361140 is 4116366.

66361140 is a `hidden beast` number, since 6 + 6 + 3 + 611 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60906 + ... + 61985.

It is an arithmetic number, because the mean of its divisors is an integer number (4301220).

Almost surely, 2^66361140 is an apocalyptic number.

66361140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66361140 is an abundant number, since it is smaller than the sum of its proper divisors (140097420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66361140 is a wasteful number, since it uses less digits than its factorization.

66361140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122909 (or 122901 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 66361140 is about 8146.2347130438. The cubic root of 66361140 is about 404.8597594002.

It can be divided in two parts, 6636 and 1140, that added together give a 5-th power (7776 = 6⁵).

The spelling of 66361140 in words is "sixty-six million, three hundred sixty-one thousand, one hundred forty".