402660266624 has 64 divisors (see below), whose sum is σ = 1000113998400. Its totient is φ = 156880619520.

The previous prime is 402660266623. The next prime is 402660266627. The reversal of 402660266624 is 426662066204.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (402660266623) 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, 20417309 + ... + 20437020.

It is an arithmetic number, because the mean of its divisors is an integer number (15626781225).

Almost surely, 2^402660266624 is an apocalyptic number.

402660266624 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

402660266624 is an abundant number, since it is smaller than the sum of its proper divisors (597453731776).

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

402660266624 is a wasteful number, since it uses less digits than its factorization.

402660266624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40854361 (or 40854349 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 44.

The spelling of 402660266624 in words is "four hundred two billion, six hundred sixty million, two hundred sixty-six thousand, six hundred twenty-four".