64727966 has 4 divisors (see below), whose sum is σ = 97091952. Its totient is φ = 32363982.

The previous prime is 64727933. The next prime is 64728019. The reversal of 64727966 is 66972746.

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

It is a self number, because there is not a number n which added to its sum of digits gives 64727966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16181990 + ... + 16181993.

It is an arithmetic number, because the mean of its divisors is an integer number (24272988).

Almost surely, 2^64727966 is an apocalyptic number.

64727966 is a deficient number, since it is larger than the sum of its proper divisors (32363986).

64727966 is a wasteful number, since it uses less digits than its factorization.

64727966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32363985.

The product of its digits is 762048, while the sum is 47.

The square root of 64727966 is about 8045.3692270772. The cubic root of 64727966 is about 401.5108817389.

The spelling of 64727966 in words is "sixty-four million, seven hundred twenty-seven thousand, nine hundred sixty-six".