61662664 has 32 divisors (see below), whose sum is σ = 132491520. Its totient is φ = 26355456.

The previous prime is 61662661. The next prime is 61662673. The reversal of 61662664 is 46626616.

It is a Smith number, since the sum of its digits (37) 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 (61662661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22977 + ... + 25519.

It is an arithmetic number, because the mean of its divisors is an integer number (4140360).

Almost surely, 2^61662664 is an apocalyptic number.

It is an amenable number.

61662664 is an abundant number, since it is smaller than the sum of its proper divisors (70828856).

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

61662664 is a wasteful number, since it uses less digits than its factorization.

61662664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2989 (or 2985 counting only the distinct ones).

The product of its digits is 62208, while the sum is 37.

The square root of 61662664 is about 7852.5577998510. The cubic root of 61662664 is about 395.0700383203.

It can be divided in two parts, 61662 and 664, that added together give a palindrome (62326).

The spelling of 61662664 in words is "sixty-one million, six hundred sixty-two thousand, six hundred sixty-four".