64670755 has 8 divisors (see below), whose sum is σ = 77719824. Its totient is φ = 51660000.

The previous prime is 64670741. The next prime is 64670761. The reversal of 64670755 is 55707646.

It is a happy number.

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

It is not a de Polignac number, because 64670755 - 2¹¹ = 64668707 is a prime.

It is a Duffinian 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, 5721 + ... + 12730.

It is an arithmetic number, because the mean of its divisors is an integer number (9714978).

Almost surely, 2^64670755 is an apocalyptic number.

64670755 is a deficient number, since it is larger than the sum of its proper divisors (13049069).

64670755 is a wasteful number, since it uses less digits than its factorization.

64670755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19157.

The product of its (nonzero) digits is 176400, while the sum is 40.

The square root of 64670755 is about 8041.8129174957. The cubic root of 64670755 is about 401.3925526171.

The spelling of 64670755 in words is "sixty-four million, six hundred seventy thousand, seven hundred fifty-five".