64725740 has 12 divisors (see below), whose sum is σ = 135924096. Its totient is φ = 25890288.

The previous prime is 64725719. The next prime is 64725743. The reversal of 64725740 is 4752746.

It is a self number, because there is not a number n which added to its sum of digits gives 64725740.

It is not an unprimeable number, because it can be changed into a prime (64725743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1618124 + ... + 1618163.

It is an arithmetic number, because the mean of its divisors is an integer number (11327008).

Almost surely, 2^64725740 is an apocalyptic number.

It is an amenable number.

64725740 is an abundant number, since it is smaller than the sum of its proper divisors (71198356).

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

64725740 is a wasteful number, since it uses less digits than its factorization.

64725740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3236296 (or 3236294 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 35.

The square root of 64725740 is about 8045.2308854377. The cubic root of 64725740 is about 401.5062790222.

The spelling of 64725740 in words is "sixty-four million, seven hundred twenty-five thousand, seven hundred forty".