64720654 has 8 divisors (see below), whose sum is σ = 97360200. Its totient is φ = 32267256.

The previous prime is 64720639. The next prime is 64720657. The reversal of 64720654 is 45602746.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64720657) 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, 45664 + ... + 47059.

It is an arithmetic number, because the mean of its divisors is an integer number (12170025).

Almost surely, 2^64720654 is an apocalyptic number.

64720654 is a deficient number, since it is larger than the sum of its proper divisors (32639546).

64720654 is a wasteful number, since it uses less digits than its factorization.

64720654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93074.

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 64720654 is about 8044.9147913449. The cubic root of 64720654 is about 401.4957622663.

The spelling of 64720654 in words is "sixty-four million, seven hundred twenty thousand, six hundred fifty-four".