123666402 has 16 divisors (see below), whose sum is σ = 260350560. Its totient is φ = 39052512.

The previous prime is 123666401. The next prime is 123666407. The reversal of 123666402 is 204666321.

It is a self number, because there is not a number n which added to its sum of digits gives 123666402.

It is not an unprimeable number, because it can be changed into a prime (123666401) 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, 542283 + ... + 542510.

It is an arithmetic number, because the mean of its divisors is an integer number (16271910).

Almost surely, 2^123666402 is an apocalyptic number.

123666402 is an abundant number, since it is smaller than the sum of its proper divisors (136684158).

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

123666402 is a wasteful number, since it uses less digits than its factorization.

123666402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084817.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 123666402 is about 11120.5396451791. The cubic root of 123666402 is about 498.2155080873.

The spelling of 123666402 in words is "one hundred twenty-three million, six hundred sixty-six thousand, four hundred two".