1572979966 has 4 divisors (see below), whose sum is σ = 2359469952. Its totient is φ = 786489982.

The previous prime is 1572979949. The next prime is 1572980041. The reversal of 1572979966 is 6699792751.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1572979966² = 4948531946874722312, 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 as a sum of consecutive naturals, namely, 393244990 + ... + 393244993.

It is an arithmetic number, because the mean of its divisors is an integer number (589867488).

Almost surely, 2^1572979966 is an apocalyptic number.

1572979966 is a deficient number, since it is larger than the sum of its proper divisors (786489986).

1572979966 is an equidigital number, since it uses as much as digits as its factorization.

1572979966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786489985.

The product of its digits is 12859560, while the sum is 61.

The square root of 1572979966 is about 39660.8114642149. The cubic root of 1572979966 is about 1162.9857600099.

The spelling of 1572979966 in words is "one billion, five hundred seventy-two million, nine hundred seventy-nine thousand, nine hundred sixty-six".