64487566 has 32 divisors (see below), whose sum is σ = 114121728. Its totient is φ = 26943840.

The previous prime is 64487537. The next prime is 64487581. The reversal of 64487566 is 66578446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132175 + ... + 132661.

It is an arithmetic number, because the mean of its divisors is an integer number (3566304).

Almost surely, 2^64487566 is an apocalyptic number.

64487566 is a deficient number, since it is larger than the sum of its proper divisors (49634162).

64487566 is a wasteful number, since it uses less digits than its factorization.

64487566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976.

The product of its digits is 967680, while the sum is 46.

The square root of 64487566 is about 8030.4150577663. The cubic root of 64487566 is about 401.0131939283.

The spelling of 64487566 in words is "sixty-four million, four hundred eighty-seven thousand, five hundred sixty-six".