1665000402 has 32 divisors (see below), whose sum is σ = 3589414080. Its totient is φ = 511842240.

The previous prime is 1665000391. The next prime is 1665000413. The reversal of 1665000402 is 2040005661.

It is an interprime number because it is at equal distance from previous prime (1665000391) and next prime (1665000413).

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, 82224 + ... + 100452.

It is an arithmetic number, because the mean of its divisors is an integer number (112169190).

Almost surely, 2^1665000402 is an apocalyptic number.

1665000402 is an abundant number, since it is smaller than the sum of its proper divisors (1924413678).

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

1665000402 is a wasteful number, since it uses less digits than its factorization.

1665000402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19418.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1665000402 is about 40804.4164521440. The cubic root of 1665000402 is about 1185.2358547078.

The spelling of 1665000402 in words is "one billion, six hundred sixty-five million, four hundred two", and thus it is an aban number.