64606761 has 16 divisors (see below), whose sum is σ = 95912320. Its totient is φ = 42981840.

The previous prime is 64606727. The next prime is 64606777. The reversal of 64606761 is 16760646.

64606761 is a `hidden beast` number, since 646 + 0 + 6 + 7 + 6 + 1 = 666.

It is not a de Polignac number, because 64606761 - 2¹⁴ = 64590377 is a prime.

It is a super-2 number, since 2×64606761² = 8348067133822242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64606721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12396 + ... + 16818.

It is an arithmetic number, because the mean of its divisors is an integer number (5994520).

Almost surely, 2^64606761 is an apocalyptic number.

It is an amenable number.

64606761 is a deficient number, since it is larger than the sum of its proper divisors (31305559).

64606761 is a wasteful number, since it uses less digits than its factorization.

64606761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4973 (or 4967 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 64606761 is about 8037.8331035174. The cubic root of 64606761 is about 401.2601115453.

The spelling of 64606761 in words is "sixty-four million, six hundred six thousand, seven hundred sixty-one".