3942665331 has 12 divisors (see below), whose sum is σ = 5778231816. Its totient is φ = 2389493920.

The previous prime is 3942665327. The next prime is 3942665339. The reversal of 3942665331 is 1335662493.

It is a happy number.

It is not a de Polignac number, because 3942665331 - 2² = 3942665327 is a prime.

It is a super-2 number, since 2×3942665331² = 31089219824538679122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3942665339) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5430306 + ... + 5431031.

It is an arithmetic number, because the mean of its divisors is an integer number (481519318).

Almost surely, 2^3942665331 is an apocalyptic number.

3942665331 is a deficient number, since it is larger than the sum of its proper divisors (1835566485).

3942665331 is a wasteful number, since it uses less digits than its factorization.

3942665331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10861362 (or 10861351 counting only the distinct ones).

The product of its digits is 349920, while the sum is 42.

The square root of 3942665331 is about 62790.6468432998. The cubic root of 3942665331 is about 1579.7800969124.

The spelling of 3942665331 in words is "three billion, nine hundred forty-two million, six hundred sixty-five thousand, three hundred thirty-one".