975381666 has 16 divisors (see below), whose sum is σ = 2229443904. Its totient is φ = 278680464.

The previous prime is 975381653. The next prime is 975381683. The reversal of 975381666 is 666183579.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11611645 + ... + 11611728.

It is an arithmetic number, because the mean of its divisors is an integer number (139340244).

Almost surely, 2^975381666 is an apocalyptic number.

975381666 is an abundant number, since it is smaller than the sum of its proper divisors (1254062238).

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

975381666 is a wasteful number, since it uses less digits than its factorization.

975381666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23223385.

The product of its digits is 1632960, while the sum is 51.

The square root of 975381666 is about 31231.1009412092. The cubic root of 975381666 is about 991.7256120067.

It can be divided in two parts, 9753 and 81666, that added together give a palindrome (91419).

The spelling of 975381666 in words is "nine hundred seventy-five million, three hundred eighty-one thousand, six hundred sixty-six".