61669572 has 12 divisors (see below), whose sum is σ = 143895696. Its totient is φ = 20556520.

The previous prime is 61669567. The next prime is 61669589. The reversal of 61669572 is 27596616.

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

It is a super-2 number, since 2×61669572² = 7606272221326368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2569554 + ... + 2569577.

It is an arithmetic number, because the mean of its divisors is an integer number (11991308).

Almost surely, 2^61669572 is an apocalyptic number.

It is an amenable number.

61669572 is an abundant number, since it is smaller than the sum of its proper divisors (82226124).

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

61669572 is a wasteful number, since it uses less digits than its factorization.

61669572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5139138 (or 5139136 counting only the distinct ones).

The product of its digits is 136080, while the sum is 42.

The square root of 61669572 is about 7852.9976442120. The cubic root of 61669572 is about 395.0847908558.

The spelling of 61669572 in words is "sixty-one million, six hundred sixty-nine thousand, five hundred seventy-two".