64999977 has 8 divisors (see below), whose sum is σ = 99047616. Its totient is φ = 37142832.

The previous prime is 64999943. The next prime is 64999981. The reversal of 64999977 is 77999946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64999977 - 2¹² = 64995881 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64999977.

It is not an unprimeable number, because it can be changed into a prime (64999927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1547598 + ... + 1547639.

It is an arithmetic number, because the mean of its divisors is an integer number (12380952).

Almost surely, 2^64999977 is an apocalyptic number.

It is an amenable number.

64999977 is a deficient number, since it is larger than the sum of its proper divisors (34047639).

64999977 is a wasteful number, since it uses less digits than its factorization.

64999977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3095247.

The product of its digits is 7715736, while the sum is 60.

The square root of 64999977 is about 8062.2563218990. The cubic root of 64999977 is about 402.0725284350.

The spelling of 64999977 in words is "sixty-four million, nine hundred ninety-nine thousand, nine hundred seventy-seven".