1662790164 has 48 divisors (see below), whose sum is σ = 4438307328. Its totient is φ = 474632928.

The previous prime is 1662790153. The next prime is 1662790193. The reversal of 1662790164 is 4610972661.

It is a super-2 number, since 2×1662790164² = 5529742258990293792, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85519 + ... + 103145.

It is an arithmetic number, because the mean of its divisors is an integer number (92464736).

Almost surely, 2^1662790164 is an apocalyptic number.

1662790164 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1662790164 is an abundant number, since it is smaller than the sum of its proper divisors (2775517164).

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

1662790164 is a wasteful number, since it uses less digits than its factorization.

1662790164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18764 (or 18762 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 1662790164 is about 40777.3241397716. The cubic root of 1662790164 is about 1184.7111674770.

The spelling of 1662790164 in words is "one billion, six hundred sixty-two million, seven hundred ninety thousand, one hundred sixty-four".