64702057 has 12 divisors (see below), whose sum is σ = 75720000. Its totient is φ = 54158328.

The previous prime is 64702031. The next prime is 64702061. The reversal of 64702057 is 75020746.

It is not a de Polignac number, because 64702057 - 2¹⁹ = 64177769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64708057) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10444 + ... + 15442.

It is an arithmetic number, because the mean of its divisors is an integer number (6310000).

Almost surely, 2^64702057 is an apocalyptic number.

It is an amenable number.

64702057 is a deficient number, since it is larger than the sum of its proper divisors (11017943).

64702057 is an equidigital number, since it uses as much as digits as its factorization.

64702057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5092 (or 5049 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 64702057 is about 8043.7588849990. The cubic root of 64702057 is about 401.4573029724.

The spelling of 64702057 in words is "sixty-four million, seven hundred two thousand, fifty-seven".