64670651 has 4 divisors (see below), whose sum is σ = 64751400. Its totient is φ = 64589904.

The previous prime is 64670647. The next prime is 64670657. The reversal of 64670651 is 15607646.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64670651 - 2² = 64670647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64670657) 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, 39161 + ... + 40778.

It is an arithmetic number, because the mean of its divisors is an integer number (16187850).

Almost surely, 2^64670651 is an apocalyptic number.

64670651 is a deficient number, since it is larger than the sum of its proper divisors (80749).

64670651 is an equidigital number, since it uses as much as digits as its factorization.

64670651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80748.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 64670651 is about 8041.8064512894. The cubic root of 64670651 is about 401.3923374511.

The spelling of 64670651 in words is "sixty-four million, six hundred seventy thousand, six hundred fifty-one".