66244977 has 12 divisors (see below), whose sum is σ = 97116240. Its totient is φ = 43503768.

The previous prime is 66244973. The next prime is 66244999. The reversal of 66244977 is 77944266.

It is not a de Polignac number, because 66244977 - 2² = 66244973 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66244973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54327 + ... + 55532.

It is an arithmetic number, because the mean of its divisors is an integer number (8093020).

Almost surely, 2^66244977 is an apocalyptic number.

66244977 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

66244977 is a deficient number, since it is larger than the sum of its proper divisors (30871263).

66244977 is a wasteful number, since it uses less digits than its factorization.

66244977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109932 (or 109929 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 66244977 is about 8139.1017317638. The cubic root of 66244977 is about 404.6233901823.

The spelling of 66244977 in words is "sixty-six million, two hundred forty-four thousand, nine hundred seventy-seven".