61697080 has 32 divisors (see below), whose sum is σ = 146985840. Its totient is φ = 23226880.

The previous prime is 61697071. The next prime is 61697081. The reversal of 61697080 is 8079616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61697081) 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, 44686 + ... + 46045.

Almost surely, 2^61697080 is an apocalyptic number.

It is an amenable number.

61697080 is an abundant number, since it is smaller than the sum of its proper divisors (85288760).

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

61697080 is a wasteful number, since it uses less digits than its factorization.

61697080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90759 (or 90755 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 61697080 is about 7854.7488820458. The cubic root of 61697080 is about 395.1435252612.

The spelling of 61697080 in words is "sixty-one million, six hundred ninety-seven thousand, eighty".