64677616 has 20 divisors (see below), whose sum is σ = 126901600. Its totient is φ = 31928832.

The previous prime is 64677611. The next prime is 64677617. The reversal of 64677616 is 61677646.

It is a super-2 number, since 2×64677616² = 8366388022886912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64677611) 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, 24321 + ... + 26848.

It is an arithmetic number, because the mean of its divisors is an integer number (6345080).

Almost surely, 2^64677616 is an apocalyptic number.

It is an amenable number.

64677616 is a deficient number, since it is larger than the sum of its proper divisors (62223984).

64677616 is a wasteful number, since it uses less digits than its factorization.

64677616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51256 (or 51250 counting only the distinct ones).

The product of its digits is 254016, while the sum is 43.

The square root of 64677616 is about 8042.2394890975. The cubic root of 64677616 is about 401.4067468585.

The spelling of 64677616 in words is "sixty-four million, six hundred seventy-seven thousand, six hundred sixteen".