64107977 has 4 divisors (see below), whose sum is σ = 64289940. Its totient is φ = 63926016.

The previous prime is 64107971. The next prime is 64107991. The reversal of 64107977 is 77970146.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31629376 + 32478601 = 5624^2 + 5699^2 .

It is a cyclic number.

It is not a de Polignac number, because 64107977 - 2⁶ = 64107913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64107971) 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, 90452 + ... + 91157.

It is an arithmetic number, because the mean of its divisors is an integer number (16072485).

Almost surely, 2^64107977 is an apocalyptic number.

It is an amenable number.

64107977 is a deficient number, since it is larger than the sum of its proper divisors (181963).

64107977 is a wasteful number, since it uses less digits than its factorization.

64107977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181962.

The product of its (nonzero) digits is 74088, while the sum is 41.

The square root of 64107977 is about 8006.7457184552. The cubic root of 64107977 is about 400.2248256932.

The spelling of 64107977 in words is "sixty-four million, one hundred seven thousand, nine hundred seventy-seven".