665001142 has 16 divisors (see below), whose sum is σ = 1080596160. Its totient is φ = 306921576.

The previous prime is 665001137. The next prime is 665001143. The reversal of 665001142 is 241100566.

It is a super-2 number, since 2×665001142² = 884453037722608328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665001143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71278 + ... + 80065.

It is an arithmetic number, because the mean of its divisors is an integer number (67537260).

Almost surely, 2^665001142 is an apocalyptic number.

665001142 is a deficient number, since it is larger than the sum of its proper divisors (415595018).

665001142 is a wasteful number, since it uses less digits than its factorization.

665001142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151384 (or 151358 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 665001142 is about 25787.6160588760. The cubic root of 665001142 is about 872.8523731659.

The spelling of 665001142 in words is "six hundred sixty-five million, one thousand, one hundred forty-two".