3213666690 has 32 divisors (see below), whose sum is σ = 8306093376. Its totient is φ = 791056320.

The previous prime is 3213666667. The next prime is 3213666737. The reversal of 3213666690 is 966663123.

3213666690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×3213666690² = 20655307188831112200, which contains 22 as substring.

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, 4119696 + ... + 4120475.

It is an arithmetic number, because the mean of its divisors is an integer number (259565418).

Almost surely, 2^3213666690 is an apocalyptic number.

3213666690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3213666690 is an abundant number, since it is smaller than the sum of its proper divisors (5092426686).

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

3213666690 is a wasteful number, since it uses less digits than its factorization.

3213666690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8240194.

The product of its (nonzero) digits is 209952, while the sum is 42.

The square root of 3213666690 is about 56689.2114074627. The cubic root of 3213666690 is about 1475.7074748393.

It can be divided in two parts, 3213 and 666690, that added together give a triangular number (669903 = T₁₁₅₇).

The spelling of 3213666690 in words is "three billion, two hundred thirteen million, six hundred sixty-six thousand, six hundred ninety".