66155190 has 32 divisors (see below), whose sum is σ = 159045120. Its totient is φ = 17611104.

The previous prime is 66155137. The next prime is 66155191. The reversal of 66155190 is 9155166.

It is a super-2 number, since 2×66155190² = 8753018327872200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66155191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20037 + ... + 23103.

It is an arithmetic number, because the mean of its divisors is an integer number (4970160).

Almost surely, 2^66155190 is an apocalyptic number.

66155190 is an abundant number, since it is smaller than the sum of its proper divisors (92889930).

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

66155190 is a wasteful number, since it uses less digits than its factorization.

66155190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3796.

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 66155190 is about 8133.5840808342. The cubic root of 66155190 is about 404.4405016175.

The spelling of 66155190 in words is "sixty-six million, one hundred fifty-five thousand, one hundred ninety".