61660601655496 has 32 divisors (see below), whose sum is σ = 122618017569600. Its totient is φ = 29006412747840.

The previous prime is 61660601655481. The next prime is 61660601655511. The reversal of 61660601655496 is 69455610606616.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (61660601655481) and next prime (61660601655511).

It is a Harshad number since it is a multiple of its sum of digits (61).

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, 2746808166 + ... + 2746830613.

It is an arithmetic number, because the mean of its divisors is an integer number (3831813049050).

Almost surely, 2^{61660601655496} is an apocalyptic number.

It is an amenable number.

61660601655496 is a deficient number, since it is larger than the sum of its proper divisors (60957415914104).

61660601655496 is a wasteful number, since it uses less digits than its factorization.

61660601655496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5493638869 (or 5493638865 counting only the distinct ones).

The product of its (nonzero) digits is 41990400, while the sum is 61.

The spelling of 61660601655496 in words is "sixty-one trillion, six hundred sixty billion, six hundred one million, six hundred fifty-five thousand, four hundred ninety-six".