66770361 has 12 divisors (see below), whose sum is σ = 110224192. Its totient is φ = 38154456.

The previous prime is 66770329. The next prime is 66770369. The reversal of 66770361 is 16307766.

It is not a de Polignac number, because 66770361 - 2⁵ = 66770329 is a prime.

It is a super-2 number, since 2×66770361² = 8916562216140642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66770369) 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, 529861 + ... + 529986.

Almost surely, 2^66770361 is an apocalyptic number.

It is an amenable number.

66770361 is a deficient number, since it is larger than the sum of its proper divisors (43453831).

66770361 is a wasteful number, since it uses less digits than its factorization.

66770361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059860 (or 1059857 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 66770361 is about 8171.3132971390. The cubic root of 66770361 is about 405.6902540944.

The spelling of 66770361 in words is "sixty-six million, seven hundred seventy thousand, three hundred sixty-one".