61660455 has 16 divisors (see below), whose sum is σ = 99265920. Its totient is φ = 32682528.

The previous prime is 61660441. The next prime is 61660471. The reversal of 61660455 is 55406616.

It is not a de Polignac number, because 61660455 - 2¹⁰ = 61659431 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10165 + ... + 15054.

It is an arithmetic number, because the mean of its divisors is an integer number (6204120).

Almost surely, 2^61660455 is an apocalyptic number.

61660455 is a deficient number, since it is larger than the sum of its proper divisors (37605465).

61660455 is a wasteful number, since it uses less digits than its factorization.

61660455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25390.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 61660455 is about 7852.4171437845. The cubic root of 61660455 is about 395.0653206080.

The spelling of 61660455 in words is "sixty-one million, six hundred sixty thousand, four hundred fifty-five".