64650072 has 32 divisors (see below), whose sum is σ = 162866880. Its totient is φ = 21384480.

The previous prime is 64650067. The next prime is 64650083. The reversal of 64650072 is 27005646.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 7138 + ... + 13425.

It is an arithmetic number, because the mean of its divisors is an integer number (5089590).

Almost surely, 2^64650072 is an apocalyptic number.

It is an amenable number.

64650072 is an abundant number, since it is smaller than the sum of its proper divisors (98216808).

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

64650072 is a wasteful number, since it uses less digits than its factorization.

64650072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20703 (or 20699 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 64650072 is about 8040.5268484099. The cubic root of 64650072 is about 401.3497569342.

The spelling of 64650072 in words is "sixty-four million, six hundred fifty thousand, seventy-two".