61662156 has 12 divisors (see below), whose sum is σ = 143878392. Its totient is φ = 20554048.

The previous prime is 61662127. The next prime is 61662157. The reversal of 61662156 is 65126616.

61662156 is nontrivially palindromic in base 5.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (61662157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2569245 + ... + 2569268.

It is an arithmetic number, because the mean of its divisors is an integer number (11989866).

Almost surely, 2^61662156 is an apocalyptic number.

It is an amenable number.

61662156 is an abundant number, since it is smaller than the sum of its proper divisors (82216236).

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

61662156 is a wasteful number, since it uses less digits than its factorization.

61662156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5138520 (or 5138518 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 61662156 is about 7852.5254536359. The cubic root of 61662156 is about 395.0689534060.

The spelling of 61662156 in words is "sixty-one million, six hundred sixty-two thousand, one hundred fifty-six".