1662656402 has 12 divisors (see below), whose sum is σ = 2741322318. Its totient is φ = 755752800.

The previous prime is 1662656381. The next prime is 1662656417. The reversal of 1662656402 is 2046562661.

It can be written as a sum of positive squares in only one way, i.e., 1278849121 + 383807281 = 35761^2 + 19591^2 .

It is a super-2 number, since 2×1662656402² = 5528852622223171208, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3434999 + ... + 3435482.

Almost surely, 2^1662656402 is an apocalyptic number.

1662656402 is a deficient number, since it is larger than the sum of its proper divisors (1078665916).

1662656402 is a wasteful number, since it uses less digits than its factorization.

1662656402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6870505 (or 6870494 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 1662656402 is about 40775.6839550240. The cubic root of 1662656402 is about 1184.6793988694.

The spelling of 1662656402 in words is "one billion, six hundred sixty-two million, six hundred fifty-six thousand, four hundred two".