61666492 has 6 divisors (see below), whose sum is σ = 107916368. Its totient is φ = 30833244.

The previous prime is 61666487. The next prime is 61666523. The reversal of 61666492 is 29466616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7708308 + ... + 7708315.

Almost surely, 2^61666492 is an apocalyptic number.

It is an amenable number.

61666492 is a deficient number, since it is larger than the sum of its proper divisors (46249876).

61666492 is a wasteful number, since it uses less digits than its factorization.

61666492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15416627 (or 15416625 counting only the distinct ones).

The product of its digits is 93312, while the sum is 40.

The square root of 61666492 is about 7852.8015383047. The cubic root of 61666492 is about 395.0782134283.

The spelling of 61666492 in words is "sixty-one million, six hundred sixty-six thousand, four hundred ninety-two".