61662940587 has 12 divisors (see below), whose sum is σ = 89615127784. Its totient is φ = 40856425920.

The previous prime is 61662940561. The next prime is 61662940589. The reversal of 61662940587 is 78504926616.

61662940587 is a `hidden beast` number, since 6 + 1 + 6 + 629 + 4 + 0 + 5 + 8 + 7 = 666.

It is not a de Polignac number, because 61662940587 - 2²⁷ = 61528722859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61662940589) 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, 21015214 + ... + 21018147.

Almost surely, 2^61662940587 is an apocalyptic number.

61662940587 is a deficient number, since it is larger than the sum of its proper divisors (27952187197).

61662940587 is a wasteful number, since it uses less digits than its factorization.

61662940587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42033530 (or 42033527 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 61662940587 in words is "sixty-one billion, six hundred sixty-two million, nine hundred forty thousand, five hundred eighty-seven".