61620133166 has 16 divisors (see below), whose sum is σ = 94700307600. Its totient is φ = 30059859648.

The previous prime is 61620133151. The next prime is 61620133181. The reversal of 61620133166 is 66133102616.

It is an interprime number because it is at equal distance from previous prime (61620133151) and next prime (61620133181).

It is a super-2 number, since 2×61620133166² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1604831 + ... + 1642778.

It is an arithmetic number, because the mean of its divisors is an integer number (5918769225).

Almost surely, 2^61620133166 is an apocalyptic number.

61620133166 is a deficient number, since it is larger than the sum of its proper divisors (33080174434).

61620133166 is a wasteful number, since it uses less digits than its factorization.

61620133166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3247843.

The product of its (nonzero) digits is 23328, while the sum is 35.

The spelling of 61620133166 in words is "sixty-one billion, six hundred twenty million, one hundred thirty-three thousand, one hundred sixty-six".