66977349 has 4 divisors (see below), whose sum is σ = 89303136. Its totient is φ = 44651564.

The previous prime is 66977347. The next prime is 66977371. The reversal of 66977349 is 94377966.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66977349 - 2¹ = 66977347 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66977341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11162889 + ... + 11162894.

It is an arithmetic number, because the mean of its divisors is an integer number (22325784).

Almost surely, 2^66977349 is an apocalyptic number.

It is an amenable number.

66977349 is a deficient number, since it is larger than the sum of its proper divisors (22325787).

66977349 is a wasteful number, since it uses less digits than its factorization.

66977349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22325786.

The product of its digits is 1714608, while the sum is 51.

The square root of 66977349 is about 8183.9690248681. The cubic root of 66977349 is about 406.1090346737.

The spelling of 66977349 in words is "sixty-six million, nine hundred seventy-seven thousand, three hundred forty-nine".