1656630099 has 12 divisors (see below), whose sum is σ = 2425690696. Its totient is φ = 1089290592.

The previous prime is 1656630097. The next prime is 1656630109. The reversal of 1656630099 is 9900366561.

1656630099 is a `hidden beast` number, since 1 + 6 + 5 + 6 + 630 + 0 + 9 + 9 = 666.

It is not a de Polignac number, because 1656630099 - 2¹ = 1656630097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1656630091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1260097 + ... + 1261410.

Almost surely, 2^1656630099 is an apocalyptic number.

1656630099 is a deficient number, since it is larger than the sum of its proper divisors (769060597).

1656630099 is a wasteful number, since it uses less digits than its factorization.

1656630099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2521586 (or 2521583 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 45.

The square root of 1656630099 is about 40701.7210815464. The cubic root of 1656630099 is about 1183.2463748218.

It can be divided in two parts, 16566 and 30099, that added together give a triangular number (46665 = T₃₀₅).

The spelling of 1656630099 in words is "one billion, six hundred fifty-six million, six hundred thirty thousand, ninety-nine".