66692190 has 32 divisors (see below), whose sum is σ = 169477920. Its totient is φ = 16738304.

The previous prime is 66692189. The next prime is 66692209. The reversal of 66692190 is 9129666.

It is a super-2 number, since 2×66692190² = 8895696413992200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64875 + ... + 65894.

It is an arithmetic number, because the mean of its divisors is an integer number (5296185).

Almost surely, 2^66692190 is an apocalyptic number.

66692190 is an abundant number, since it is smaller than the sum of its proper divisors (102785730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66692190 is a wasteful number, since it uses less digits than its factorization.

66692190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130796.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 66692190 is about 8166.5286382893. The cubic root of 66692190 is about 405.5318724590.

The spelling of 66692190 in words is "sixty-six million, six hundred ninety-two thousand, one hundred ninety".