72842661 has 12 divisors (see below), whose sum is σ = 106550080. Its totient is φ = 47946600.

The previous prime is 72842657. The next prime is 72842669. The reversal of 72842661 is 16624827.

It is not a de Polignac number, because 72842661 - 2² = 72842657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72842669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50515 + ... + 51936.

Almost surely, 2^72842661 is an apocalyptic number.

It is an amenable number.

72842661 is a deficient number, since it is larger than the sum of its proper divisors (33707419).

72842661 is a wasteful number, since it uses less digits than its factorization.

72842661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102536 (or 102533 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 72842661 is about 8534.7912101000. The cubic root of 72842661 is about 417.6334419920.

The spelling of 72842661 in words is "seventy-two million, eight hundred forty-two thousand, six hundred sixty-one".