402621166 has 16 divisors (see below), whose sum is σ = 640139760. Its totient is φ = 189266560.

The previous prime is 402621151. The next prime is 402621173. The reversal of 402621166 is 661126204.

It is a super-2 number, since 2×402621166² = 324207606622399112, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28836 + ... + 40456.

It is an arithmetic number, because the mean of its divisors is an integer number (40008735).

Almost surely, 2^402621166 is an apocalyptic number.

402621166 is a deficient number, since it is larger than the sum of its proper divisors (237518594).

402621166 is a wasteful number, since it uses less digits than its factorization.

402621166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12659.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 402621166 is about 20065.4221485619. The cubic root of 402621166 is about 738.4122067133.

The spelling of 402621166 in words is "four hundred two million, six hundred twenty-one thousand, one hundred sixty-six".