64661412 has 48 divisors (see below), whose sum is σ = 157377024. Its totient is φ = 20640000.

The previous prime is 64661411. The next prime is 64661419. The reversal of 64661412 is 21416646.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 64661412.

It is not an unprimeable number, because it can be changed into a prime (64661411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36712 + ... + 38432.

It is an arithmetic number, because the mean of its divisors is an integer number (3278688).

Almost surely, 2^64661412 is an apocalyptic number.

64661412 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

64661412 is an abundant number, since it is smaller than the sum of its proper divisors (92715612).

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

64661412 is a wasteful number, since it uses less digits than its factorization.

64661412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860 (or 1858 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 64661412 is about 8041.2319951609. The cubic root of 64661412 is about 401.3732219257.

The spelling of 64661412 in words is "sixty-four million, six hundred sixty-one thousand, four hundred twelve".