666783772190 has 32 divisors (see below), whose sum is σ = 1225822598784. Its totient is φ = 261022694400.

The previous prime is 666783772183. The next prime is 666783772199. The reversal of 666783772190 is 91277387666.

It is a super-2 number, since 2×666783772190² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666783772199) 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, 10119632 + ... + 10185308.

It is an arithmetic number, because the mean of its divisors is an integer number (38306956212).

Almost surely, 2^666783772190 is an apocalyptic number.

666783772190 is a deficient number, since it is larger than the sum of its proper divisors (559038826594).

666783772190 is a wasteful number, since it uses less digits than its factorization.

666783772190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87332.

The product of its (nonzero) digits is 32006016, while the sum is 62.

The spelling of 666783772190 in words is "six hundred sixty-six billion, seven hundred eighty-three million, seven hundred seventy-two thousand, one hundred ninety".