66702251007 has 16 divisors (see below), whose sum is σ = 112935028480. Its totient is φ = 38115571896.

The previous prime is 66702251003. The next prime is 66702251039. The reversal of 66702251007 is 70015220766.

It is not a de Polignac number, because 66702251007 - 2² = 66702251003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66702251003) 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, 176460793 + ... + 176461170.

It is an arithmetic number, because the mean of its divisors is an integer number (7058439280).

Almost surely, 2^66702251007 is an apocalyptic number.

66702251007 is a deficient number, since it is larger than the sum of its proper divisors (46232777473).

66702251007 is a wasteful number, since it uses less digits than its factorization.

66702251007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352921979 (or 352921973 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The spelling of 66702251007 in words is "sixty-six billion, seven hundred two million, two hundred fifty-one thousand, seven".