66902973 has 16 divisors (see below), whose sum is σ = 94944960. Its totient is φ = 41758976.

The previous prime is 66902963. The next prime is 66902989. The reversal of 66902973 is 37920966.

It is a cyclic number.

It is not a de Polignac number, because 66902973 - 2⁹ = 66902461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66902923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6718 + ... + 13376.

It is an arithmetic number, because the mean of its divisors is an integer number (5934060).

Almost surely, 2^66902973 is an apocalyptic number.

It is an amenable number.

66902973 is a deficient number, since it is larger than the sum of its proper divisors (28041987).

66902973 is a wasteful number, since it uses less digits than its factorization.

66902973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6876.

The product of its (nonzero) digits is 122472, while the sum is 42.

The square root of 66902973 is about 8179.4237572093. The cubic root of 66902973 is about 405.9586557105.

The spelling of 66902973 in words is "sixty-six million, nine hundred two thousand, nine hundred seventy-three".