42166602640 has 40 divisors (see below), whose sum is σ = 98197395768. Its totient is φ = 16839106560.

The previous prime is 42166602619. The next prime is 42166602661. The reversal of 42166602640 is 4620666124.

It is an interprime number because it is at equal distance from previous prime (42166602619) and next prime (42166602661).

It can be written as a sum of positive squares in 4 ways, for example, as 6744351376 + 35422251264 = 82124^2 + 188208^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 42166602640.

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, 380881 + ... + 478960.

Almost surely, 2^42166602640 is an apocalyptic number.

42166602640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42166602640 is an abundant number, since it is smaller than the sum of its proper divisors (56030793128).

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

42166602640 is a wasteful number, since it uses less digits than its factorization.

42166602640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860467 (or 860461 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 37.

The spelling of 42166602640 in words is "forty-two billion, one hundred sixty-six million, six hundred two thousand, six hundred forty".