1213642066 has 48 divisors (see below), whose sum is σ = 2308013568. Its totient is φ = 468374400.

The previous prime is 1213642057. The next prime is 1213642097. The reversal of 1213642066 is 6602463121.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90751 + ... + 103261.

It is an arithmetic number, because the mean of its divisors is an integer number (48083616).

Almost surely, 2^1213642066 is an apocalyptic number.

1213642066 is a deficient number, since it is larger than the sum of its proper divisors (1094371502).

1213642066 is a wasteful number, since it uses less digits than its factorization.

1213642066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12587 (or 12574 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 1213642066 is about 34837.3659452031. The cubic root of 1213642066 is about 1066.6703101221.

The spelling of 1213642066 in words is "one billion, two hundred thirteen million, six hundred forty-two thousand, sixty-six".