61166533400 has 72 divisors (see below), whose sum is σ = 165430533420. Its totient is φ = 20971379520.

The previous prime is 61166533343. The next prime is 61166533423. The reversal of 61166533400 is 433566116.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3110942 + ... + 3130541.

Almost surely, 2^61166533400 is an apocalyptic number.

It is an amenable number.

61166533400 is an abundant number, since it is smaller than the sum of its proper divisors (104264000020).

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

61166533400 is a wasteful number, since it uses less digits than its factorization.

61166533400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6241513 (or 6241497 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 61166533400 in words is "sixty-one billion, one hundred sixty-six million, five hundred thirty-three thousand, four hundred".