1957980066 has 64 divisors (see below), whose sum is σ = 4902094080. Its totient is φ = 508354560.

The previous prime is 1957980029. The next prime is 1957980107. The reversal of 1957980066 is 6600897591.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26575 + ... + 67986.

It is an arithmetic number, because the mean of its divisors is an integer number (76595220).

Almost surely, 2^1957980066 is an apocalyptic number.

1957980066 is an abundant number, since it is smaller than the sum of its proper divisors (2944114014).

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

1957980066 is a wasteful number, since it uses less digits than its factorization.

1957980066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94619.

The product of its (nonzero) digits is 816480, while the sum is 51.

The square root of 1957980066 is about 44249.0685325691. The cubic root of 1957980066 is about 1251.0348903784.

The spelling of 1957980066 in words is "one billion, nine hundred fifty-seven million, nine hundred eighty thousand, sixty-six".